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Let’s face it…
Choosing a bike lock that’s lightweight, reliable, and affordable isn’t easy.
That’s why in this Ottolock Sidekick review, we’ll take a close look at two their popular models: the compact U-Lock and the folding lock.
Both are designed to provide strong security while remaining easy to carry.
So to make you help a decision, let’s break down their features and see which one fits your needs best.
Without further ado, let’s start with the heavy duty anti-theft bicycle u-lock. ↴
1. OTTOLOCK Sidekick Compact U-Lock
- Price: Under $40
- Lock Type: Key Lock
- Dimensions: 5 x 1.5 x 7.75 inches
- Material & Weight: Alloy Steel, 750g (1.65 lbs)
The OTTOLOCK Sidekick U-Lock brings a fresh take to the traditional U-lock design with its lightweight construction and portable form factor.
It’s specifically engineered for cyclists who need reliable security without the weight penalty of conventional locks.
Key Features
One feature that stands out for me is the silicone coating, which helps protect your bike frame from scratches, showing that OTTOLOCK pays attention to practical cycling needs.
The lock’s 12mm double-shackle hardened steel construction offers good resistance against opportunistic theft.
With a compact opening size of 2.75″ by 5.75″, it’s well-suited for securing your bike to standard posts and poles. Weighing just 750 grams, it’s noticeably lighter than many traditional U-locks.
Build
The Sidekick U-Lock uses 12mm hardened steel and a double-shackle design with an anti-rotation deadbolt for added security.
It’s built to resist cutting and tampering while keeping the weight manageable. The silicone coating helps protect your bike’s finish and makes the lock more comfortable to handle.
Moreover, its compact size reduces potential weak points and keeps the design simple and effective.
Usability & Portability
After spending time analyzing this product, the portability factor really shines through.
It easily fits in most backpacks, bags, or even larger pockets. The bright color options (orange and blue) make it easy to spot and add a bit of personality to your security setup.
The lock comes with three keys, which is genuinely helpful since we’ve all been there with lost keys (speaking from universal human experience, of course).
It’s perfect for students commuting to school, casual riders making quick stops, or anyone who prioritizes convenience without sacrificing basic security.
The simple key mechanism means no fumbling with combinations in poor lighting. New cyclists and kids will particularly appreciate its user-friendly design and manageable size.
Reasons To Buy:
- Compact size fits easily in bags
- Great value for money under $40
- Exceptionally lightweight at only 750g
- Comes with three keys for convenience
- Silicone coating prevents frame damage
Reasons To Avoid:
- Small opening may not fit all bike frames
- Limited reach for securing frame and wheel together
- Not recommended as sole protection in high-theft areas
Short Verdict
I’m going to be honest…
What impresses me most about this lock is how it balances portability with practical security for everyday use.
The lightweight design makes it genuinely convenient to carry, addressing one of the biggest complaints about traditional U-locks.
Most people consistently praise its ease of use and compact form factor, so you might find it ideal for quick coffee stops or school commutes.
However, it’s important to take note that the small opening can be limiting. Some users find it challenging to secure both frame and wheel to larger posts.
The security level is appropriate for moderate-risk situations, though seasoned cyclists in high-theft areas might want to pair it with additional security.
Overall, it delivers excellent value for riders who prioritize convenience and need reliable protection for short stops.
2. OTTOLOCK Sidekick Folding Lock
- Price: Under $80
- Lock Type: Key Lock
- Dimensions: 7.5 x 2 x 2.25 inches
- Material & Weight: Alloy Steel, 1 kg (2.15 lbs)
The OTTOLOCK Sidekick Folding Lock represents a modern approach to bike security with its innovative folding design and robust construction.
This lock is specifically marketed toward e-bike owners who need flexible security options without excessive weight.
Key Features
What I appreciate about the Sidekick Folding Lock is its 5mm thick hardened alloy steel. It feels sturdy and well-made, and it’s clearly built to stand up against bolt cutter attempts.
Unlike fixed U-locks, it unfolds to offer up to 11 inches of interior space, which makes it a lot more flexible when you’re locking up to awkward racks or larger posts.
I also like how it adapts to different setups without much hassle. Plus, the included frame mount is a nice bonus. It makes carrying the lock around a lot more convenient for everyday rides.
Build
The lock is made up of several steel segments linked by reinforced pivot points, all using 5mm hardened alloy steel.
I like that the folding design spreads out pressure across multiple joints instead of depending on one spot, that adds a layer of durability you can feel.
The steel itself feels thick and dependable, giving a good level of protection without sacrificing the convenience of folding.
That said, the more complex design does mean there are more moving parts compared to a standard U-lock, which could be something to keep in mind over time.
Usability & Portability
Even though it weighs just over 2 pounds, the folding design makes it easy enough to carry, especially with the included frame mount.
I found the mount stays secure during rides, no rattling or shifting, which is a big plus. You also get three keys, which adds some peace of mind, especially considering the lock’s higher price.
It’s a solid option for e-bike riders who are okay with the added weight in exchange for more locking flexibility. The folding mechanism feels smooth and doesn’t take much effort to use.
That said, if you’re used to lighter locks, the weight might stand out, but for most e-bike setups, it’s not a dealbreaker.
Reasons To Buy:
- Well-suited for e-bikes and scooters
- Versatile 11-inch reach when unfolded
- Includes convenient bike mount system
- Compact when folded despite robust construction
- Excellent resistance to cutting tools with 5mm steel
Reasons To Avoid:
- Higher price point under $80
- Significantly heavier at 2.15 lbs
- Complex folding mechanism with multiple pivot points
Short Verdict
This folding lock really shines in scenarios where you need flexibility and don’t mind carrying extra weight.
(Although, frankly, it’s less weight than most others.)
The 5mm steel construction provides genuinely impressive cut resistance, and users appreciate the versatility of the folding design for challenging locking situations.
And, the included mounting system is a thoughtful addition that makes daily use more practical.
It’s important to take note, however, that some people question the long-term durability of the pivot points and wonder about potential weakness in the folding mechanism.
The weight is definitely noticeable compared to their U-lock option mentioned earlier, though e-bike riders generally find this acceptable.
All in all:
For the price point, it offers solid security features, and you’re paying a premium for the convenience and versatility of the folding design.
How Do They Compare?
Now…
Still can’t decide which OTTOLOCK Sidekick Lock is right for your bike?
I’ve put together this side-by-side comparison to help you see the key differences at a glance. Have a look:
In a nutshell:
The U-Lock is great for people who value lightweight, reliable everyday security.
The Folding Lock suits those who need extra reach and versatility, especially electric bike riders.
One is under $40 and the other is under $80 (respectively).
The choice is yours.
About OTTOLOCK
Now…
You may be wondering about the brand behind these locks to understand where they’re coming from.
This company began in 2016 when business-minded cyclists came up with the original “cinch lock” idea in a Portland coffee shop, recognizing the need for lightweight, portable security solutions.
The company, OTTO DesignWorks LLC, launched after a successful crowdfunding campaign proved there was real demand for convenient quick-stop locks.
OTTOLOCK’s lightweight and compact design has been featured in major publications like Bicycling Magazine and Popular Mechanics, earning attention for its innovative approach to portable security, especially among cyclists and outdoor enthusiasts.
One thing that stands out to me is their commitment to domestic manufacturing, all patented cinch locks are proudly hand-made in Oregon using components sourced across the U.S.
Since their launch, OTTOLOCK has sold over 300,000 cinch locks globally, expanding from their original idea into a broader line of security products.
The brand is built on values like innovation, teamwork, and customer service, and you can see that in the small, thoughtful details of their products.
They also offer additional items such as:
- Original Cinch Lock: The lightweight, compact bike lock that created the category, starting at only 145g and coiling to 3-inch diameter.
- Hexband Cinch Lock: Their toughest cinch lock with 6 layers of stainless steel wrapped in aramid fiber for enhanced security needs.
Check them out.
Next, is OTTOLOCK worth it?
Why Choose OTTOLOCK Sidekick Locks?
Now that you know who’s behind the product, let’s look at what makes the Sidekick line worth considering.
Sidekick locks are designed to solve everyday security issues without adding bulk.
They combine lightweight convenience with solid protection, ideal for riders who want flexibility without compromising on safety.
Here are a few key benefits that stand out:
1. Superior Weight-to-Security Ratio
What I really appreciate about Sidekick locks is how they manage to offer solid security without feeling like you’re lugging around a brick.
The U-lock gives you tough, hardened steel protection at just 750g, and the folding lock uses 5mm steel while staying just over 2 pounds. That’s noticeably lighter than most locks with similar protection.
For me, that means I can ride or walk around with my gear without constantly noticing the extra weight, and that makes a big difference day to day.
2. Frame Protection Technology
Both Sidekick locks come with a silicone coating that really helps protect your bike’s paint from getting scratched or chipped, something that can happen a lot with regular metal locks.
It’s a small detail, but it makes a difference if you want to keep your bike looking sharp and in good shape.
It shows OTTOLOCK pays attention to the little things that matter to riders.
3. Optimized Locking Dimensions
Another thing that stood out to me about Sidekick locks is how their sizes actually fit real-life locking situations.
The U-lock’s compact opening works great for most standard posts and quick stops, while the folding lock’s 11-inch reach gives you extra flexibility for trickier spots.
It’s clear they’ve designed these locks to be practical and hassle-free, giving you just the right amount of reach without any extra bulk getting in the way.
4. Multiple Key Backup System
Each Sidekick lock includes three keys instead of the standard two, which adds extra security and convenience.
Losing or damaging keys happens, and having a spare means you’re less likely to get locked out.
Plus, using keys avoids the hassle of remembering combinations, especially useful in stressful or low-light situations.
It’s a practical feature that helps make these locks more reliable day to day.
Next.
OTTOLOCK Sidekick Locks (FAQs)
Is it suitable for electric bikes?
The folding lock works excellently with e-bikes and is actually marketed specifically for this use case.
However, the U-lock has limitations due to its small locking area (2.75″ x 5.75″). It may not accommodate bulky e-bike frames or wider tires when putting your electric bikes on bike racks or large posts.
For e-bike owners, the folding lock is definitely the better choice.
How many keys are included with the lock?
Each Sidekick lock comes with three keys.
Since replacement keys aren’t currently available, keeping one key in a secure location separate from your regular keychain is essential for long-term peace of mind.
Can Sidekick lock keys be replaced?
Unfortunately, Sidekick locks are not serialized and use hundreds of different key patterns, so replacement keys aren’t available.
The locks come with three keys specifically because of this limitation, it’s strongly recommended to keep one key in a safe place as a backup
What’s covered under the Limited Warranty?
OTTO DesignWorks will repair or replace any product found defective in materials or workmanship within one year of original purchase.
This warranty only applies to products purchased from authorized dealers, not individual sellers or unauthorized third parties.
The warranty covers manufacturing defects but doesn’t include damage from attempted theft or misuse.
OTTOLOCK Sidekick Review (Final Verdict)
Look…
Regardless of the product you choose, both OTTOLOCK Sidekick locks offer great security and quality,
For some of you a compact U-Lock is the better choice because it’s lightweight, reliable, and offers excellent value for everyday use, especially at under $40.
Whereas the Folding Lock is handy for e-bike riders or those needing extra reach, though its higher price and added weight make it less desirable for some cyclists.
So, unless you really need that folding versatility, the U-Lock’s simplicity and portability is something that’ll probably appeal to most.
All in all, make a decision based on your budget and your needs.
Check out all OTTOLOCK products here.
Now, I’d like to hear your thoughts.
- What do you think of this OTTOLOCK Sidekick review?
- Have you tried either lock before, and what was your experience like?
Let me know in the comments below!
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